. Elementary and dental radiography / by Howard Riley Raper . ssed condition, or because of resorptionof the roots and the presence of the succedaneous teeth. A radiographof the case will enable us to decide, and our treatment will be governedaccordingly. Not only will the radiograph show the operator when de-ciduous teeth should be removed, but will aid him in their removal—especially in cases where the temporary teeth are badly decayed—byshowing the exact size and location of the temporary teeths roots andthe position of the succedaneous teeth. THE USES OF THE RADIOGRAPH IN DENTISTRY 163 6.
. Elementary and dental radiography / by Howard Riley Raper . ssed condition, or because of resorptionof the roots and the presence of the succedaneous teeth. A radiographof the case will enable us to decide, and our treatment will be governedaccordingly. Not only will the radiograph show the operator when de-ciduous teeth should be removed, but will aid him in their removal—especially in cases where the temporary teeth are badly decayed—byshowing the exact size and location of the temporary teeths roots andthe position of the succedaneous teeth. THE USES OF THE RADIOGRAPH IN DENTISTRY 163 6. Co Show the Orthodontist When fie may move the Coming Permanent teeth bymoping the Deciduous teeth. It impressed me very much when I first heard of radiographicallyobserving, and then regulating, teeth before their eruption. I heard ofthis in a lecture by Dr. Ottolengui. I quote Dr. Ottolengui: One of the difficult operations which confronts fig, 146. the orthodontist at times^ is the bodily movement ot the bicuspids buccally. Very often in the past at-. Fig. This picture shows that the temporary first molar may be extracted. Ihe tem-porary second molar should not be extracted for a year or so. when the second bicuspid willbe just ready to take its place. (Radiograph by Lewis, of Chicago.) tempts to widen the arch, after the eruption of the bicuspids, has resultedin tipping the crowns buccally, the apices of roots remaining in the orig-inal apical arch. Hence, one of the chief advantages of early orthodonticinterference lies in the fact that the temporary molars may be movedbuccally, carrying with them the underlying bicuspids, and this advantageis made more clear if it be recalled that at this period the bicuspid rootsare but partly formed. Even when the roots of the temporary molarsare already considerably absorbed, still enough may be left to serve todeflect the oncoming bicuspids in the direction desired. This slide (Fig. 146), from the collection of Dr. Matthew Oy
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